Convert HEX, RGB, and HSL colors

Paste a supported color value and PocketSpry shows the equivalent HEX, RGB, and HSL representations at once. Everything runs locally in your browser — your color is not uploaded to a server or sent to PocketSpry’s AI API. HEX output uses canonical uppercase six- or eight-digit form, and rgb()/hsl() use lowercase function names.

How alpha transparency is converted

RGBA and HSLA alpha is a number from 0 to 1. Eight-digit HEX stores alpha as one byte from 00 through FF, so a decimal alpha is quantized to one of 256 representable levels when represented in HEX — for example an alpha of 0.5 becomes the HEX byte 80, and the HEX byte 80 shows as an alpha of about 0.502. A fully opaque color (alpha 1) is shown as six-digit HEX, rgb(), and hsl(); a transparent color keeps the eight-digit HEX, rgba(), and hsla() forms.

Supported color formats

Version 1 supports HEX (3-, 4-, 6-, or 8-digit, with or without a leading #), comma-separated rgb(R, G, B) / rgba(R, G, B, A) with whole-number channels from 0 to 255, and comma-separated hsl(H, S%, L%) / hsla(H, S%, L%, A) with a degree hue and 0–100% saturation and lightness. It does not support CSS color names, CMYK, LAB, LCH, OKLCH, Display P3, or the modern space/slash CSS syntax; those simply are not accepted by this tool.

Does PocketSpry upload my color?

No. This tool converts your color locally in your browser using simple arithmetic — there is no server request, no database, and no AI. Out-of-range values are reported as errors rather than silently clamped or repaired.

Frequently asked questions

What color formats does this support?: HEX, RGB/RGBA, and HSL/HSLA.
Can I convert HEX to RGB?: Yes.
Can I convert RGB to HEX?: Yes.
Can I convert HEX to HSL?: Yes.
Does it support alpha transparency?: Yes, via rgba(), hsla(), and 8-digit HEX.
What does 8-digit HEX mean?: It is #RRGGBBAA — the last byte is the alpha channel.
Does it support 3-digit HEX?: Yes; the output expands it to six digits.
Does it support 4-digit HEX?: Yes; the output expands it to eight digits.
Can I omit the # in HEX input?: Yes.
Does it support CSS color names?: Not in v1.
Does it support OKLCH or Display P3?: Not in v1.
Does it support modern space-separated rgb()/hsl() syntax?: Not in v1; use the comma-separated forms.
Why can alpha look slightly different after HEX conversion?: HEX alpha is an 8-bit value, so decimal alpha is quantized to one of 256 representable levels.
Does PocketSpry upload my color?: No. Conversion runs entirely in your browser.